/*
struct ListNode {
    int val;
    struct ListNode *next;
    ListNode(int x) :
            val(x), next(NULL) {
    }
};*/
class Solution
{
public:
    ListNode* FindFirstCommonNode( ListNode* pHead1, ListNode* pHead2)
    {
        ListNode* cur1 = pHead1, *cur2 = pHead2;
        while(cur1 != cur2)
        {
            cur1 = cur1 != NULL ? cur1->next : pHead2;
            cur2 = cur2 != NULL ? cur2->next : pHead1;
        }
        return cur1;
    }
};